Jolteon is a quadrupedal, mammalian, feliform Pokémon with lagomorph traits, covered in spiny bright yellow fur. It has long ears, and a short body shape, resembling a hare or jackrabbit. It has deep purple (almost black) almond-shaped eyes, a blunt catlike muzzle with a small, black triangular nose. It has a spiky white mane encircling its neck. Its legs and paws are slender, with three toes on each and no visible claws; though it is seen in The Electric Tale of Pikachu manga to have extendable and retractable feline claws. Jolteon has a spiny fringe of fur covering its backside, and a small short spike-like tail that is not often visible (but seen in games such as Pokémon Stadium and Pokémon Scarlet and Pokémon Violet. Its back legs seem to be powerfully-built, allowing it to run at high speeds and jump, like a cheetah and a hare, as it resembles both fast animals. In Pokémon card art, it is shown to be leaping upward onto a skyscraper, in a similar appearance and manner as a hare/jackrabbit, with its long feet extended.Jolteon are very sensitive and temperamental, which causes them to constantly charge as they quickly change moods. This means novice Pokémon Trainers will find it difficult to tame them, until said Trainers have earned their trust. However, this is not always the case, as seen in the anime, specifically "Eevee & Friends" and Bernice, some Jolteon can be quite friendly or even affectionateJolteon are able to gather negative ions from the atmosphere, using the resulting electricity to create lightning bolts of up to 10,000 volts. Their individual cells also create small electrical charges on their own, which combine with the static electricity caused by their bodies can result in powerful electric-type attacks. They can also make lightning and cause small thunderstorms.

When threatened or angered, their fur stands on their ends and becomes sharp bristles, and they will fire these electrified needles from their bodies. When they exhale, little sparks form in their mouths due to their internal electricity

Jolt: jolt is very salty currently and doesn't like anyone. After being released by his previous pokémon trainer for being too difficult to train and not the correct evolution of his eevee. He is not happy and will not hesitate to flee or attack if he feels threatened.